Lecture 19-Communities

Lecture 19-Communities - Communities and Ecosystems...

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Communities and Ecosystems Elements of Ecology: Community Ecology: Food webs/keystone species: 16, 17 Landscape ecology and disturbance: 19 Primary and Secondary Succession: 18 Soil formation: Chapter 4 Ecosystem Ecology: Energetics: 20 Nutrient Cycles: 21-22
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Communities and Ecosystems Biological community = the different species of plants and animals that interact with each other and share an ecosystem
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Communities and Ecosystems Biological community = the different species of plants and animals that interact with each other and share an ecosystem Interdependence
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Communities and Ecosystems Biological community = the different species of plants and animals that interact with each other and share an ecosystem Interdependence Same geographic area
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Communities and Ecosystems Biological community = the different species of plants and animals that interact with each other and share an ecosystem Interdependence Same geographic area Same habitat type
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Communities and Ecosystems Ecosystem = plants, animals, plus the physical environment e.g. water, soil, nutrients, biomass, temperature, rainfall
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Communities and Ecosystems Physical environment affects which plants and animals occur Physical environment affects how many organisms an area can support
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Communities and Ecosystems Natural processes affect the physical environment (soil, nutrients, biomass, temperature, rainfall) Photosynthesis Respiration Decomposition
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Communities and Ecosystems Energy moves through biological communities Analyze this by looking at food chains Each level of a food chain = trophic level
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Food Chains Producers = plants Make their own food from the sun’s energy Consumers = must eat other organisms
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Consumer Consumer Consumer Producer
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Types of Consumers Herbivores: eat plants
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Types of Consumers Herbivores: eat plants Carnivores: eat other animals
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Types of Consumers Herbivores: eat plants Carnivores: eat other animals Omnivores: eat plants and animals
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Types of Consumers Herbivores: eat plants Carnivores: eat other animals Omnivores: eat plants and animals Decomposers: eat dead stuff
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Carnivore Carnivore Herbivore Producer
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Food Webs Communities are usually made up of multiple food chains Food webs Many interactions between multiple species
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Energy Transfer Energy is neither created nor destroyed Energy can be transformed from one form to another Sun —> Plant tissue —> Animal tissue
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Trophic Levels Divisions within trophic levels:
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Trophic Levels Divisions within trophic levels: Primary producer = plant
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Trophic Levels Divisions within trophic levels: Primary producer = plant Primary consumer (1°) = eats plant
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Trophic Levels Divisions within trophic levels: Primary producer = plant Primary consumer (1°) = eats plant Secondary consumer = eats 1°
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Trophic Levels Divisions within trophic levels:
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This note was uploaded on 10/07/2011 for the course BIOS 230 taught by Professor Gibbons during the Spring '08 term at Ill. Chicago.

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Lecture 19-Communities - Communities and Ecosystems...

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